Investigation of the filtering of TEW scatter estimates used to compensate for scatter with ordered subset reconstructions

M. A. King; D. J. deVries; T. S. Pan; P. H. Pretorius; J. A. Case

Investigation of the filtering of TEW scatter estimates used to compensate for scatter with ordered subset reconstructions

M. A. King, D. J. deVries, T. S. Pan, P. H. Pretorius, J. A. Case

Research output: Contribution to conference › Paper › peer-review

Abstract

The sensitivity of reconstructed slices to changes in low-pass filter design, impact of changes in source distributions and count levels on filter design, and an alternative to subtraction of the scatter estimate from photopeak window images, were investigated. The normalized mean square error (NMSE) between the estimated and true slices as criterion, showed that low pass filtering of triple energy windows (TEW) scatter estimate decreased the NMSE. Cutoff frequency of Butterworth filter depended on the number of counts in TEW windows and source distributions. The Wiener low pass filter adapted to produce a low NMSE. Inclusion of the scatter estimate into ordered subset maximum likelihood reconstruction resulted in a low NMSE.

Original language	English (US)
Pages	1077-1081
Number of pages	5
State	Published - 1996
Externally published	Yes
Event	Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3) - Anaheim, CA, USA Duration: Nov 2 1996 → Nov 9 1996

Other

Other	Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3)
City	Anaheim, CA, USA
Period	11/2/96 → 11/9/96

ASJC Scopus subject areas

Radiation
Nuclear and High Energy Physics
Radiology Nuclear Medicine and imaging

Cite this

@conference{deed6192bbd2497a9da319f8e4b96c8e,

title = "Investigation of the filtering of TEW scatter estimates used to compensate for scatter with ordered subset reconstructions",

abstract = "The sensitivity of reconstructed slices to changes in low-pass filter design, impact of changes in source distributions and count levels on filter design, and an alternative to subtraction of the scatter estimate from photopeak window images, were investigated. The normalized mean square error (NMSE) between the estimated and true slices as criterion, showed that low pass filtering of triple energy windows (TEW) scatter estimate decreased the NMSE. Cutoff frequency of Butterworth filter depended on the number of counts in TEW windows and source distributions. The Wiener low pass filter adapted to produce a low NMSE. Inclusion of the scatter estimate into ordered subset maximum likelihood reconstruction resulted in a low NMSE.",

author = "King, {M. A.} and deVries, {D. J.} and Pan, {T. S.} and Pretorius, {P. H.} and Case, {J. A.}",

note = "Copyright: Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.; Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3) ; Conference date: 02-11-1996 Through 09-11-1996",

year = "1996",

language = "English (US)",

pages = "1077--1081",

}

TY - CONF

T1 - Investigation of the filtering of TEW scatter estimates used to compensate for scatter with ordered subset reconstructions

AU - King, M. A.

AU - deVries, D. J.

AU - Pan, T. S.

AU - Pretorius, P. H.

AU - Case, J. A.

PY - 1996

Y1 - 1996

N2 - The sensitivity of reconstructed slices to changes in low-pass filter design, impact of changes in source distributions and count levels on filter design, and an alternative to subtraction of the scatter estimate from photopeak window images, were investigated. The normalized mean square error (NMSE) between the estimated and true slices as criterion, showed that low pass filtering of triple energy windows (TEW) scatter estimate decreased the NMSE. Cutoff frequency of Butterworth filter depended on the number of counts in TEW windows and source distributions. The Wiener low pass filter adapted to produce a low NMSE. Inclusion of the scatter estimate into ordered subset maximum likelihood reconstruction resulted in a low NMSE.

AB - The sensitivity of reconstructed slices to changes in low-pass filter design, impact of changes in source distributions and count levels on filter design, and an alternative to subtraction of the scatter estimate from photopeak window images, were investigated. The normalized mean square error (NMSE) between the estimated and true slices as criterion, showed that low pass filtering of triple energy windows (TEW) scatter estimate decreased the NMSE. Cutoff frequency of Butterworth filter depended on the number of counts in TEW windows and source distributions. The Wiener low pass filter adapted to produce a low NMSE. Inclusion of the scatter estimate into ordered subset maximum likelihood reconstruction resulted in a low NMSE.

UR - http://www.scopus.com/inward/record.url?scp=0030368956&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030368956&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0030368956

SP - 1077

EP - 1081

T2 - Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3)

Y2 - 2 November 1996 through 9 November 1996

ER -

Investigation of the filtering of TEW scatter estimates used to compensate for scatter with ordered subset reconstructions

Abstract

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ASJC Scopus subject areas

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